Floor-dressing machine.



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G. B. WATTLBS.

FLOOR DRESSING MACHINE.

APPLICATION FILED JUNI: 12.1905

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UNITED STATES PATENT OFFICE.

CYRA B. WATTLES, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ELECTRIC FLOOR SURFACER COMPANY, OF GARDIN ER, MAINE, A CORPORATION OF MAINE.

FLOOR-DRESSING MACHINE.

Specification of Letters Patent.

Patented March 10, 1908.

Application led June 12, 1905. Serial No. 264,851.

To all whom it 'may concern:

Be it known that I, CYRA B. WATTLES, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Floor-Dressing Machines, of which the following is a specification.

This invention has reference to an improvement in floor dressing machines used for grinding, surfacing and polishing wood loors.

Wood floors are constructed of different kinds of Wood which are hard or soft according to the species used, and in the use of a iloor dressing machine require a different pressure to achieve the best result, also old floors that are badly worn require more pressure than new iloors, and in using the machine for polishing a floor less pressure is required.

The object of my invention is to adjust the pressure of the grinding or polishing roll of a Hoor dressing' machine on a iloor, and I accomplish this object by the use of adjustable weighted levers on the machine, the adjustment -of which brings more or less weight on the roll, also by adjusting the position of the handle to give an increased or decreased leverage of the handle on the machine.

My invention consists in the peculiar and- -novel constructionof a iloor dressing machine comprisin a frame, a handle pivotally secured to t e frame, means for adjusting the position of the handle, wheels supporting the rear' of the frame, a grinding or polishing roller' supporting the forward end of the i frame, a motor rigidly secured to the frame, a

:for adjusting the tension of the belt connecting the driving pulley of the -rnotor with a pulley on the rol shaft, means belt, and adjustable weighted levers pivotally secured in a position to bring more or less weight on the roll, with details of constructiom'as will be more fully set forth hereinafter.

Figure l is a side view of my improved floor dressing machine, showing the weighted le-` vers in the position for exerting the least pres- -sure on the roll in full lines, and in the position for exerting the greatest pressure on the roll in broken lines, with the handle of the the forwardly-extending arms 1,2 a2 support-v ing the bearings a3 a for the shaft of the roll d, the two rearwardly-extending lugs a ai* to which the lower end of the handle b is pivotally secured, the two bosses a5 a5 on "the-side of the body portion a adjacent the rear part ofthe frame, and the upwardlyextending bracket a.6 having the semi-circular slot a7 on the power side of the frame, as shown in Fi 1.

The handIe I) has the T-shaped upper end b2 and the downwardly-extending lug b2 supporting the adjusting bolt b3 on its lower end in a position to engage with the rear .portion of the frame a, as shown in Fig. 1.

The handle b issuiiiciently long to bring the T-shaped upper end b into a convenient position for the operator. In practice I indthat the operator unconsciously exerts a certain pressure in a downward direction on the upper end of the handle, which acting through the wheels c c as a fulcrum, diminishes the pressure of the roller d on the floor.

improved floor dressing ma- Y By adjusting the set bolt b3 to raise or lower the upper end of the handle, the leverage of the handle (as acted upon by the operator) is decreased or increased and the pressure of the roller d on the floor is increased or decreased as desired.

The wheels c c are rotatably secured to the axles c c which are secured in the bosses a5 a5 on the frame a in any well known way. .The wheels c c are placed in a position on the frame a to bring the greater weight of the frame a, and the motor e on the roll d.

'lhe roll d is secured .to the shaft d which is supported in the bearings a3 a3. A pulley d2 is'secured to the power end of the shaft d', A .e "q

asshown in Fig. 2. The roll d is covered with an abrasive material such as sand paper for grinding or surfacing a floor, or with a polishing material such. as pile fabric for polishing the iioor.

The motor e may be of any kind desired. ln the preferred form l use an electric motor having the driving shaft e with the pulley e2 connected to the pulley d2 on the shaft of the roll d by the belt The casing e of the motor has on each side the outwardly-extending bosses e4 e4 placed directly above the axles of the wheels c c. The segmental members e5 e5 having the semi-circular slots e6 eG are each secured to the end of a boss e4 (or formed integral with the boss) in a position to bring the slot above the boss, as shown in Fig. 1.

The idler pulley g is rotatably secured to the free end of the arm g which is pivotally secured at its upper end to the upwardlyextending bracket of by the pin g2, 'm a position to bring the pulley g over the belt f and adjacent the driving pulley e2, as shown in Fig. 1. A bolt g3 extends through the slot a7 in the bracket a and through a hole in the arm g where it is secured by the nut g4. By this construction the tension of the belt f on the pulleys is adjusted by raising or lowering the idler pulley g.

The weighted levers h h are pivotally secured at each side of the machine to the bosses e4 e4. A heavy weight h/ is adjustably secured to each lever by the set bolt h2 and a bolt h3 extends through the semi-circular slot e in the segmental member e5 and through a hole in the lever h where it is secured by the nut 7b4, as shown in Fig. 1. By this construction the levers 7L 7L are adjustably secured to the motor casing so as to bring the Weights 71, 7L into a position to decrease the pressure on the roll d, as shown in full lines in Fie. 1, or to increase the pressure on the roll d, as shown in broken lines in Fiv. 1. It is evident that the levers 71, h may l:be adjusted to give any intermediate pressure desired, also one lever may be adjusted-to bring the weight to the rear and the other adjusted to bring its weight to the front of the machine, thus giving an iniinite number of variations to the pressure of the roller d on the iioor.

In the use of my improved floor dressing machine the motor e revolves the dressing roil d on the iloor at a high rate of speed through the pulley c2, the belt f, and the pulley d2 on the roll shaft d', while the operator moves the machine on the door by the handle l), and the pressure ot the dressing roll d on the floor is easily and quickly varied ber, a lever adjustably secured to the segmental member and a weight adjustably secured to the lever, as and )lor the purpose set forth.

' 2. ln a iioor dressing machine, a dressing roll d, a boss e4, a segmental member e5 having the semi-circular slot e6 secured to the boss e4, a lever h pivotally secured to the boss e4, a weight h adjustably'secured to the lever 7i, by a set bolt h2, and a bolt h3 adapted to extend through the circular slot e in the member e5 and through a hole in the lever h whereit is secured by a nut h4, whereby the lever h is adjusted to bring' the weight h away from or over the dressing roller d to decrease or increase the weight on the dressing roll,-thereby decreasin or increasing the pressure ofthe dressing ro on a floor, means or securing the boss e'1L to the machine, and means for revolving the dressing roll d, as described. Y

3. 1n a floor dressing machine, the combination of a Jframe c havin the body portion a', the forwardly-exten arms a? a.z supporting the bearings a3 a3, t e two rearwardly-extending lugs c4 a4, the bosses e5 a5 on the side of the body a, and the upwardlyextending bracket a6 having the semi-circular slot a7, a handle b having the T- sha ed upper end b', the downwardly-exten ing lug b2 in which is the adjusting bolt b3, the wheels c c rotatably secured to the axles c c which are secured to the bosses a5 a5 on the frame a, a dressing roll d secured to a shaft d which is supported in the bearings c3 a?, a pulley d2 secured to the end of the shaft d', a motor e rigidly secured to the frame a and having the driving shaft e', the pulley e2, the casing e3 having the bosses e4 e4, the segmental member e5 e5 having the semicircular slots e6 e secured to the bosses e4 e4, a belt f connecting the pulley d2 with the pulley c2, an idler pulley g rotatably secured to the free end of an arm g which is pivotally secured to the bracket a, a bolt g3 adapted to extend through the semi-circular slot a] in j the bracket a and through a hole in the arm by adjusting the position of the weighted j g where it is secured by the nut g, a lever h levers h h or the position of the handle I).

pivotally secured to the boss e4, a weight h 1t is evident that the weighted lever h adjustably secured to the lever h, andabolt could be pivotally secured to a vertical arm ha adapted to extend through the semi-cir- .Y

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cular slot e in the segmental member e5 and In testimony whereof I have signed my through a hole in the lever h Where it is name to this specification in the presence of secured by a nut 71,4, whereby the handle is two subscribing Witnesses.

I 881,638 I 3 l adjusted and the Weighted lever h is ad- CYRA B. WATTLES. 5 justed to bring more or less weight on the WVitnesses: dressing roll d to vary the pressure of the ROBERT G. FOSTER,

dressing roll on a floor, as described. l J A. MILLER, Jr. 

